二级生化出水化学法深度除磷实验  

Advanced chemical dephosphorization of secondary effluent from wastewater treatment plant

作　　者：方华[1] 万震[1] 江玒 冯锡杰[1] 

机构地区：[1]南京信息工程大学 环境科学与工程学院,南京210044

出　　处：《南京信息工程大学学报（自然科学版）》2013年第5期462-465,共4页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：江苏省自然科学基金(BK20100592);江苏省高校自然科学基础研究计划(08KJB610006)

摘　　要：以二级生化出水为对象,采用4种常规除磷剂开展了化学法深度除磷和投药量经验系数法研究.研究结果表明,FeCl3在pH为7.5、投加量为6.5 mg/L条件下,Al2(SO4)3在pH为6、投加量为3.75 mg/L条件下,可使出水总磷小于0.5 mg/L,且处理费用低廉,是生化出水深度除磷的适宜药剂.FeCl3在除磷的同时,对COD也具有较好的去除效果,可作为总磷和COD均超标的二级生化出水深度处理的有效途径.投药量经验系数法可根据原水和出水的磷质量浓度,估算出除磷剂投加量,在工程实践中具有较大的参考价值.Chemical dephosphorizations by four kinds of agents for secondary biochemical effluent were carried out and dosing experience coefficient was investigated. The results showed that when pH = 7.5, FeC13 dosage is 6. 5 mg/L, and pH = 7.5, A12 （SO4 ）3 dosage is 3.75 mg/L, the effluent TP is less than O. 5 mg/L. These two flocculants pos- sessed the advantages of good effect,low cost and easy operation. In addition, FeC1z was able to reduce COD effec- tively with TP removal simultaneously. Therefore, FeC13 can be used to treat the secondary biochemical effluent which TP and COD level are impermissibly high. The method of dosing experience coefficient can calculate the quantity of reagent added by the phosphorus concentration of inflow and effluent. It is very useful for phosphorus re- moving projects.

关 键 词：二级生化出水 化学除磷 投药量经验系数 

分 类 号：X703.1[环境科学与工程—环境工程]